It's also the second level (after Level 1) where there is no quest related to the level.
Strangely, the monsters of Level 11 are much easier to fight than those of Level 10, but in groups they are still powerful.
The following monsters can be found in Level 11:
- Storm Lord (a version of Lightning Demon)
- Guardian (a version of Balrog)
- Cave Viper (a basic variant of Viper)